Can you find out the missing number in the grid?

I am the beginning of everything, the end of everywhere. I'm the beginning of eternity, the end of time and space. What am I?

What does below rebus means ?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

I have branches, but no fruit, trunk or leaves. What am I?

There is a place where if I stand up straight, I will still be considered sideways.

A four-digit number (not beginning with 0) can be represented by ABCD. There is one number such that ABCD=A^B*C^D, where A^B means A raised to the B power. Can you find it?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?